Door lock



A. J. DUBEE.

DOOR LOCK.

I Patented Mar. 28,1922.

w res Mamet noon LOCK."

Specification of Letters latcnt.

Patented Mar. 28,

Application filed March a, 1921. Serial No. 449,485.

Be it known that l, Anntann J. Dunne, acitizen the United States, residing at Glens Falls,in the county of lVarren and State of New York, have invented certain new and useful Improvements in Door Locks, of which the following is a speciiication.

This invention has for its object. the provision of simple. inexpensive and efficient means whereby the insertion of a key into a door lock may be prevented. A secondary object of the invention is to provide a device for the stated purpose which will be inconspicuous when applied to a door and which may be readily set, when desired, to permit the insertion or" a key. Other objects will appear incidentally in the course of the following description and the invention resides in certain novel features which are illustrated in the accompanying drawings and will be hereinafter particularly pointed out in the claims.

In the drawings- Figure 1 is a perspective view of a portion of a door having my improvements applied thereto;

Fig. 2 is an enlarged view, partly in elevation and partly in section, of the inven tion.

The door 1 may be of any construction and is preferably provided with panels, indicated at 2. The lock 3 may also be of any preferred type in which a key is employed to project or withdraw the bolt, the keyhole being indicated at 4: in the accompanying drawings. In carrying out my invention. I provide an opening 5 through the door stile immediately below the lock and in the bottom of the lock casing, 1 form a slot 6 which communicates with the opening 5 in the door, as shown clearly in Fig. 2. The open ing or chamber 5 need he only large enough to accommodate the operating rod presently described. It will further be noted that the opening 5 extends through the edge of the door frame into the panel space and an escutcheon or wear plate 7 may be secured to the edge of the door stile over the end of the opening, as will be readily understood Within the lock casing, I slidably mount a stop block 8 which rests upon the bottom of the lock casing and is equipped with a pin or similar device 9 which extends from the block through the slot 6 and into the passage as clearly shown. Through the lower end of the pin 9, I insert the threaded end of a push rod 10 which is disposed longitudinally within the passage 5 and projects at its opposite end through the opening of the escutcheon 7 so that it may be manipulated from within'the panel space of the door. Nuts 15 are mounted on the threaded portion of the push rod and turned home against the opposite sides of the pin 9 to secure the pin to the rod. this arrangement permitting the effective length of the rod to be varied according to the width of the stile. 'To the outer end of this push rod, l pivotally attach a handle member 11 which is preferably similar to the push rod in form and is provided in one side or edge with transverse notches 12 which" may be engaged, in one position of the device. by a latch 13 pivotally mounted upon the edge of the stile. immediately above the escutcheon 7 so that when the bar has been pushed into the door stile, the latch will hold the same against movement. I also provide upon the inner edge of the stile a hook or other keeper 14 which is mounted in the stile for turning movement and is adapted to engage around the handle member 11 to hold the same in a raised position at an angle to the opening in the escutcheon when the stop block is set across the keyhole so that accidental shifting of the push bar and the stop block 8 will be prevented.

The use of the device is thought to be obvious from what has been said, espe ially when considered with the showing in Fig. of the drawings. It will be readily noted that if the push bar be pulled outwardly, the block 8 will be slid across the keyhole 4 and the entrance of a key will be then prevented. The handle member 11 may be swung upward when the parts are in the position shown in Fig. 2 and engaged by the keeper 14 so that it will extend across th opening of the escutcheon 7 and accidental shifting of the block from across the keyhole will not be apt to occur. When it is desired to set the device so as to permit the insertion of a key, the keeper 14: is rotated so that its hook terminal will be released from engagement with the handle member 11 and said member may then be swung downwardly into alinement with the main portion of the push bar. A slight push upon said bar will then slide the block 8 from across the keyhole 4 and a key may be inserted. to witl draw or project the bolt in the ordinar manner.

Nty device is obviously simple in construction and arrangement and may be readily applied to any ordinary look at a ver low cost. It is especially advantageous when an outer door is operable by an ordinary key, as when a house is closed for the night the block 8 may be slid across the keyhole after the door is locked and the key withdrawn and the block cannot be manipulated from the outer side otthe door so that the insertion of a key by outsiders is positively prevented. Of course, when the occupants of the room are to pass out or in or it is intended to permit access to the room, the block or slide 8 is moved from over the keyhole and the key may then be inserted. It will be readily noted that the stop block leaves ample room for the operation of the bolt and does not, in any position, inter fere with the bolt in any way. 7

Having thus described the invention, what is claimed as new is: i

l. The combination with a door stile ha ving an opening theretl'irough, of a lock set in the door immediately above said opening and provided with a slot in its Wall communieating, with said opening, a slide within. the lock adapted to extend across the keyhole of the lock. a pin extending from said slide through th slot in the lOCK into the opening in the door, and means operable through said opening to set the slide.

2. The combination with door stile. and a lock set therein, of a slide within the lock adapted to extend across the keyhole of the same, a push bar mounted in the door stile and connected with said slide, a handle member pivotally attached to the outer end of said push bar, and means on the door stile to engage said handle member and hold it in a set position. 7

3. The combination with a door stile, and a lock set therein. of a slide mounted within the lock to extend across the keyhole of 

